An item of any peripheral shape usually having one flat or spherical surface and a centrally located hole. It is designed for applications involving moving (kinetic) loads. Except for items fabricated from bearing quality synthetic (plastic) or composed of multilayer material, one bearing surface must either have a specific surface finish designation of 32 microinch (0.8 micrometre) or less, arithmetical average (aa) (arithmetic mean deviation) or one of the following conditions: be lapped or ground; have visible or detectable means of lubrication; grooves, indentations; or self-lubrication. The thickness must not exceed 25 percent of the outside diameter of the shortest distance between peripheral flats (when thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance). Excludes straight, tubular (without flange) items having a bearing surface(s) parallel to the axis of the bore only. See also washer, flat and spacer, sleeve.
NSN 6220-01-634-0660
NSN 5905-00-285-2866
NSN 6620-01-536-7799
NSN 5975-00-820-1581
NSN 5905-00-350-0648
NSN 6320-01-449-0043
NSN 5945-01-384-3735
NSN 5915-01-633-9845
NSN 6220-01-065-1387
NSN 5999-00-197-2351
NSN 6645-01-166-1891
NSN 5945-01-443-3168